Data/hora: 11/06/2024 00:57:39

Provedor de dados: | 74
País: | Brazil
Título: | Genetic characterisation of populations of the critically endangered Goliath grouper ( Epinephelus itajara,  Serranidae) from the Northern Brazilian coast through analyses of mtDNA
Autores: | Silva-Oliveira,Gláucia C.; Rêgo,Péricles S. do; Schneider,Horacio; Sampaio,Iracilda; Vallinoto,Marcelo.
Data: | 2008-12-01
Ano: | 2008
Palavras-chave: | Goliath grouper; Epinephelus itajara; Control region; MtDNA; Population genetics.
Resumo: | The Goliath grouper ( Epinephelus itajara ) is one of the most endangered species of fish of the subfamily Epinephelinae. Slow to develop and mature, and dependent on mangrove habitats for breeding, the species also suffers intense harvesting, which has reduced drastically in numbers in many areas. To contribute to the understanding of the characteristics of  E. itajara  populations, we conducted a molecular genetics study of the species, focusing on populations from the Northern Brazilian coast. The mtDNA control region (D-loop) of 116 individuals from five localities (Bragança, Ajuruteua, Parnaíba, Fortaleza and Natal) was analysed, and a sequence of 499 base pairs identified. Analyses of the sequences indicated that genetic variability was generally lower in  E. itajara  than in other endangered species of the genus. AMOVA found no significant grouping structure among the populations. Nested Clade Analysis revealed a significant association between genetic variability and geographic distribution among only three populations (Ajuruteua, Parnaíba and Natal). Genetic diversity was higher in populations from the Amazon region, which may be related to the better conservation of mangrove habitats in this area. Therefore, the present study could be used for the implementation of conservation and management measures in order to protect and consolidate these populations.
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500029
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572008005000016
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.31 n.4 2008
Fonte: | info:eu-repo/semantics/openAccess